Heating system.



PATENTED FEB. 26, 1907.

J. s. 0. NIGHOLLS. HEATING SYSTEM. APPLICATION FILED JAN. 27, 1902.

06 5 M mm J lated according tothe pressure in the system, .Wltli the result that the temperature and is connected with the upper portion of heater the system through HEATlNG SYSTEM.

No. 845,371. I Specification of Letters Patent.

Patented Feb. 26, 1907.

Application filed January 27,1902. seen in. 91,361.

expansion-chamber, herein shown as a tank To all whom, it may concern.-

Be it known that 1, JOHN S'. O, NIoHoLLs, a 6', connected with heater 1 through a pipe, I

citizen of the United States, residing at Bosg herein shown as made up of sections 7 and ton, in the county of Suflolk,.State of Massa- 51, the latter connecting with return 5. In

chusetts, have invented certain new and usethis pipe made up of pipe-sections 7 and 51 fuldmprovements in Heating Systems, of lis a duplex valve 8, made with a ort 9, which the following a specification, rcfer- 1 which is controlled by .a 'check-valye 99,

ence being had therein to the accompanying drawings.

F igure 1 IS a view in adapted to be opened by pressure from the i expansion-chamber and the form of a diagram, or otherwise when there is no excess pressure illustrat ng one form ofmy lnvention. Figs. from that direction, and made also with-a 2 and Show detalls hereinafter described. 1 by-pass 10 around valve 99, which by-pass. My invention relates toheating systems in 10 is controlledby a valve 100, whos stem general, and particularly to hot-water heatt 101 extends through a stutiing-box 81 to the ing systems of that class known as .closed ,outside of easing 8, here it is pivotally con systems. I a nested at 102 with a lever 103, fulcrumed at My Invention has for its obiect to improve 104 upon a link 105. Link 105 is pivotally the construction of closed hot-water heating I connected at 106 to a lug 82, fast to the cap systems to the end that the pressure may be I 83 of the stuffing-box 81. Lever 103 carries automatically and perfectly regulatedwit-hat one end an ad'ustable' weight 107, which out wastage of heat or water. acts through the To theseends my improved heating sysagainst a stop or shoulder 84in position to t-em comprises a'heater, a radiator, supply close by-pass 10 and in opposition to presand return pipes connecting the heater and sure from below said valve. radiator, an expansion-chamber, a branch Vvhen vthe pressure in the system below pipe communicating at one end with the valve 100 exeeedsjthat pressure against which expansion-chamber and at its other end with l weight 107 can hold valve 100 against stop the heater, and means controlled by the pres- 1 84, valve 100 will be raised, and as the pressure in the heater for controlling the flow sure belowvalve 100 continues to increase the through said branch pipe in both directions upward movement of the valve -100will conand for regulating the heater. By this continue until said valve passes the'angle 109 in struction the passage of the water to or from by-pass 10, when the latter will be open for the branch pipe is automatically regulated according to the pressure in the system, while at the same time the action of the heater is also automatically reguwill exhaust from by-pass 10 into pipe-seetion 7, thus crowdingthe water in section 7 back into tank 6 Thus it willbe seen that valve 100 performs'the function of a safetyvalve and acts to relieve an excess ofv pressure in the system by automatically opening bypass 10 when a predetermined pressure exists in the system,-so that the surplus water is discharged pressure in the system is automatically maintained below a predetermined point.

.Other features of my invention are hereinafter pointed out.

Having reference to the drawings, 1 represents a heater of any suitable form, and 2 the furnace thereof.

3 represents a radiator, one end of which into the expansion-chamber, made up of pipe 7 and tank 6, and the pressure is thereby maintained below a predetermined point They purpose of check-valve 99 is to permit water to pass from the expan sion-chamber 6, through pipe 7 and conduit 9, into pipe 51, so that that part of the system below valve 9 is kept filled with water from tank-6, said valve acting to close conduit 9 when that part of the system below the valve is filled with water, s0 that water cannot return to tank 6 except under the conditions i described above. Tank 6 is herein shown as 1 by a supply-p'pe 4 and the other end of which is connected with the lower portion of heater 1 by a return-pipe 5. The circulation of the waterjis from the heater through pipe 4 to radiator 3, through the latter to pipe 5, and through-pipe 5 back to heater 1.

Above the heater land radiator 3 is an lever to hold valve 100 to close by gravity the passage of water through it, which water open and is preferably the open flushingtank of a water-closet, through which water is supplied to the system.

Lever 103 has connected to it one end of a chain 21, the lower end of which is connected with the hinged damper 22 of furnace 2, so that as valve 100 is raised by'an increase of pressure below it chain 21 is lowered and damper 22 closed, and furnace 2 thereby regulated so as to reduce the intensity of its heat. When valve 100 descends, damper 22 is opened with the opposite effect upon the furnace.

The distance between shoulder 84 and the angle 109 in by-pass 10 is such as to allow sufficient upward movement of valve 100 to permit valve 100 to entirely close damper 22 I before by-pass 10 is opened. Thus in some instances the closingof the damper 22 before by-pass 10 iscpened will be sufficient to check a rise of pressure in the system without valve 100 opening by-pass 10. Thus it will be clear that not only does valve 100 act to control by-pass 10, but that through its connection with the furnace it also serves to regulate the latter and to close the damper before it acts'as a safety-valve. This valve 100 performing these two functions and combined with the expansion-chamber and valve 99 is an important feature of my invention.

Having now described my invention, without attempting to set forthall of the forms in which it may be embodied or all of the uses to which it may be applied, what I claim is 1. The improved heating system above described comprising a heater; a radiator; supply and return pipes connecting the heater and radiator; an expansion-chamber;

a branch pipe communicating at one end with the expansion-chamber and at its other end with the heater; and means controlled 1 supply by the pressure in the heater for controlling the flow through said branch pipe in both directions and for regulating the heater.

2. The improved heating system above ldescribed comprising a heater; ,a radiator;

supply and return pipes connecting the heater and radiator; an expansion-chamber; a branch pipe communicating at one end with the expansion-chamber and at its other end with the heater; a check-valve in said branch pipe opening toward the heater; a by-pass around the check-valve; a normally closed valve in the by-pass controlled by the pressure in the system so as to open, when a predetermined pressure exists in the latter; and means connected with the normally closed valve for regulating the heater.

3. The improved heating system above described comprising a heater; a radiator; and return pipes connecting the heater and radiator; an expansion-chamber; a separate branch pipe connected at one end with the expansion-chamber and communieating at its other end with the heater; a check-valve in said branch pipe opening toward the heater; a by-pass around the checkvalve; a normally closed valve in the bypass controlled by the pressure in the system so as to open when a predetermined pressure exists in the latter, and means connecting the normally closed valve with the damper of the heater for closing the damper before the normally closed valve is opened.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN S. C. NICHOLLS.

OSCAR F. HILL. 

